Ter-sips



No. 620,499. l Patented Feb. 2a, |899. .T. E. mcHTl-:R-slPs.

MACHINE FUR CUTTING TBIANGULR PIECES v0F TIN PLATE.

(Applcatioxi led May 14, 1898. ,l

No. 620,499. Patented Fab.. 2a, |899.

f T. E. RICHTER-SIPs. MACHlNE FR CUTTlNG TRINEULAR PIECES 0F TIN PLATE.

(Application Sled May- 14, 1898.) (No Nudel.) 2 Sheets-Sheet 2.

W/T/VESSES IN V570/7S Tw: wams Eriks co., Pno'raLlTnoA. WASHINGTON. D. t:`

UNITED STATES TRAUGOT'I EMIL RICHTER-SI PATENT OEEICE.

PS, OF LEUTZSCH, GERMANY.

MACHINE FOR CUTTING TRIANGULAR PIECES OF TIN-PLATE.

SPECIFICATION forming part of Letters Patent N 0. 620,499, .dated February 28, 1899.

Application led May 14,1898- To all whom it may concern.-

Be it known that I, TEAUGOTT EMIL RICH- TER-SIPs, master locksmith, of Kurzestrasse 2, Leutzsch, in the German Empire, have invented a new and useful Improvement in Machines for Cutting Triangular Pieces of Tin- Plate or Similar Material, of which the following is a full and clear description.

Triangular pieces such as are used in the corners of window-frames in some systems of glazing have hitherto usually been punched or stamped out and as a result have had rough edges and have not been iat, which has necessitated subsequent rolling or pressing. By the use of this improved machine the triangular pieces are cut from a strip of metal by' means of two knives which operate alternately at a suitable angle to each other and the severed portions are perfectly flat and have straight edges.

The improved machine consists,essentially, of three parts-viz., means for conveying or feeding the strip of tin-plate, two longitudinallymovable knives or supports for the plate, and two rotating knives, both the ro- Y tating knives and the supporting-knives being arranged at suitable angles with each other.

In order that my invention may be more readily understood, I have hereto appended a sheet of drawings, to which I will hereinafter refer and which illustrate a machine constructed to embodymy improvements.

Figure l represents the machine in plan. Fig. 2 shows it as seen from underneath. Fig. 3 illustrates a longitudinal section.

On the table l are arranged the two guiderails 2 and 3, between which passes the strip of tin-plate 4, from which the triangular pieces are to be cut. The distance between the rails may be Varied to-suit different widths of strips by means of the slots 5 and the screws or bolts 6. At the front end of the table is a cross rail or piece 7, between which and the table there is just room for the passage of the strip 4,

l which is thus held more securely.

At the front end 0f the table two knives or cutters 8 9 are arranged at an angle to each other, and each is longitudinally movable in a horizontal direction. They are provided with extensions or projections ll and l2,which extend under or through the guide-rails l0,

Serial No. 680,691'. (No model.)

by means of which the knives are alternately pushed under and withdrawn from the strip of 1netal4.

The required horizontal motion is imparted and 14, which are pivoted at l5 and 16 and are connected to the knives, one to each, at the points 17 and 18. The free ends of the levers carry pins or bowls 19 and 20, which engage with cams or grooves in the peripheries of the disks 2l and 22. These grooves are in one plane for the greater part of their lengths; but each is provided with a swell or cam 23 or 24, the cam in one disk being ardegrees with the cam upon the other disk. It will be easily seen on reference to the drawing that the rotation of the disks, which are mounted upon a common shaft, will eect the lalternate reciprocation of the knives.

Mounted upon or Within the frame 25 are the two rotary knives or cutters 26 and 27, which are secured to suitable shafts geared together by the bevel-wheels28 and 29. The two knives are mounted at an angle of one hundred and eighty degrees apart and are so arranged that each of them forms a pair of shears with one or other of the reciprocating knives 8 or 9. The cutting of the pieces from v the strip of tin is effected by feeding the strip forward to the desired extent over one of the reciprocating knives-for example, S-which occupies its most forward position under the strip. The rotary knife 26 then comes down and shears off the triangular piece. The

26 moves away, the strip is fed forward, the

strip, and the knife 27 comes round and cuts the piece from the strip. The knives on each side of the strip thus alternately come into action, the strip of tin being fed forward intermittently.

The apparatus for feeding forward the strip of vtin is constructed and arranged as follows: A crank-disk 30 has attached to it a link or rod 3l, which passes over a pin or support 32 and is pressed constantly down toward the table by a spring 33. The front end or part 35 of the link is preferably covered with india-rubber and comes over the strip of tin.

When the disk 30 rotates in the direction of knife 9 moves forward and comes under the to the knives by means of the bent levers 13 ranged at an angle of one hundred and eighty knife 8 is then withdrawn, the rotary knife IOO the arrow and after the link 3l has been moved forward toits farthest position, as indicated by Fig. 3, continued rotation depresse-s the attached cud of the link 3l and raises the outer end Owing to the engagement of the disk the link is withdrawn, with its end 35 raised. During the next half-rotation, however, the end 35 of the link is pressed .downward upon the tin strip, which is thus fed forward. If desired, the strip 4 may he mounted upon rollers to facilitate its movement. The crank-pin of the disk 30 may be adjustable relatively to the center of the disk, so as to Vary the amount of throw and consequently the feed of the strip. v

Vhen the machine is to be used, a strip of tin is placed between the guide-rails 2 and 3 and is pushed forward under the cross-rail 7. The main wheel 34: is now rotated and drives the bevel-Wheel 3G, by means of Which the rotary knives 26 and 27 are operated, as Well as the wheels 37 and 3S, for driving the stripfeeding device and the grooved disks 2l and rocating and two rotary knives which together form two pairs of shears inthe described manner and for the purpose mentioned.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

TRAUGOTT EMIL RICll'lER-SIPS.

IVitnesses:

BRUNO NALDING, RUDOLPH FRICKE. 

